Hi Mike, Let's focus on the fork() hangs in this bug. It's true that the two could be related, but the symptoms don't quite line up.
You say you can reproduce the behavior on 2.3.32-311. Do you have a procedure for getting an instance into the broken state, so you can then cause fork() hangs with spinning CPUs? Also, is irqbalance running on your instances? If not, does the fork() hanging behavior change if irqbalance is running on the instance (started at boot)? -- You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. https://bugs.launchpad.net/bugs/708920 Title: Strange 'fork/clone' blocking behavior under high cpu usage on EC2 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
